lavc/qsvenc: use the common option "trellis" of AVCodecContext

Signed-off-by: Zhong Li <zhong.li@intel.com>

libavcodec/qsvenc.c

@@ -683,7 +683,10 @@ FF_ENABLE_DEPRECATION_WARNINGS
 #endif
 
 #if QSV_HAVE_TRELLIS
-            q->extco2.Trellis = q->trellis;
+            if (avctx->trellis >= 0)
+                q->extco2.Trellis = (avctx->trellis == 0) ? MFX_TRELLIS_OFF : (MFX_TRELLIS_I | MFX_TRELLIS_P | MFX_TRELLIS_B);
+            else
+                q->extco2.Trellis = MFX_TRELLIS_UNKNOWN;
 #endif
 
 #if QSV_VERSION_ATLEAST(1, 8)

libavcodec/qsvenc_h264.c

@@ -181,7 +181,7 @@ static const AVCodecDefault qsv_enc_defaults[] = {
 #if FF_API_CODER_TYPE
     { "coder",     "-1"    },
 #endif
-
+    { "trellis",   "-1"    },
     { "flags",     "+cgop" },
 #if FF_API_PRIVATE_OPT
     { "b_strategy", "-1"   },

libavcodec/qsvenc_hevc.c

@@ -254,7 +254,7 @@ static const AVCodecDefault qsv_enc_defaults[] = {
     // same as the x264 default
     { "g",         "248"   },
     { "bf",        "8"     },
-
+    { "trellis",   "-1"    },
     { "flags",     "+cgop" },
 #if FF_API_PRIVATE_OPT
     { "b_strategy", "-1"   },

libavcodec/qsvenc_mpeg2.c

@@ -87,7 +87,7 @@ static const AVCodecDefault qsv_enc_defaults[] = {
     // same as the x264 default
     { "g",         "250"   },
     { "bf",        "3"     },
-
+    { "trellis",   "-1"    },
     { "flags",     "+cgop" },
 #if FF_API_PRIVATE_OPT
     { "b_strategy", "-1"   },